Chron Me! Online Stopwatch
Easily record time in increments, whenever you have a multi-part task to time. Press start; press stop; add a label for that segment; repeat as needed; download the resulting comma- or semicolon-separated file to your computer, or open it with Excel.
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Circle Drawing Experiment - Thomas Denney
Draw a figure on the grid by clicking and dragging. Upon release of the mouse button, this JavaScript calculates a "perfect circle" accuracy score by using the sketch's perimeter as the circumference of a perfect circle, and comparing its area to the
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Circle Scribe Disk Compass - Bill Harper
A new instrument for manually exploring shape and space, used to draw diagrams on paper, from cartoon characters to limacons, as well as standard geometric constructions. Unlike toys like spirograph, the Circle Scribe Disk Compass requires some geometrical
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Circles of Dissonance - Ivars Peterson (MathTrek)
Much of today's music rests upon ancient tradition going back thousands of years to the time of the Greek mathematician and mystic Pythagoras. The Pythagoreans observed that tones an octave apart are pleasing to the ear. In modern terms,
one can say
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Class2Class - Melanie Sprouse
Class2Class is a clearinghouse designed to facilitate student and class participation in Internet projects, including collaborative projects, data-collecting experiments, peer tutoring, and keypal exchanges designed to enhance the mathematics in your
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ClassZone - McDougal Littell, Publishers
In ClassZone, McDougal Littell has gathered together all of its activities, interactive online resources, research links, chapter quizzes, and other materials that support its popular middle and high school mathematics textbooks, such as Integrated Math
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Climate Classroom - One Million Acts of Green
This curriculum encourages students to analyze the science of global warming and its relevance to current events and their daily lives, through classroom activities, lesson plans, and family and community activities. The One Million Acts of Green Program
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CLK-Calculator - Lars Kobarg
Reverse Polish notation Calcualtor is a calculator program for Windows with unit conversion and matrix calculator, functions for vectors and complex numbers, and a
function plotter.
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CLK-Calculator - Lars Kobarg
A skinnable calculator for Windows, intended for a wide range of users. Use algebraic or RPN input mode to do unit conversions, matrix calculations, complex number calculations, vectors handling and function plotting. Find constants or formulas in the
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CLN: Community Learning Network
Designed to help K-12 teachers integrate technology into their classrooms. Includes over 225 menu pages with more than 4,200 annotated links to educational WWW sites, as well as over 100 WWW resources of their own.
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Clutch Hitting - Elan Fuld
Download the PDF of a study examining whether clutch (or choke) hitters exist in professional baseball. Using play-by-play data, Fuld found substantial evidence that clutch hitters exist in Major League Baseball, when sacrifice flies are considered as
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